Show all system apps to hub teamfood, remove location indicator

Location indicator has its own flag, so it is being removed from the hub
teamfood. Also, showing all system usages (except the system app) for
the hub teamfood.

Bug: 172868375
Test: atest PrivacyDialogControllerTest, PrivacyItemControllerFlagsTest
Change-Id: Iad5b141f600a0bf830d5b2ef5169ed90533914cb